kcarstensen59070
03.12.2019 •
Mathematics
1. a researcher is interested in knowing about the number of hours ucf students sleep per night. in a survey of 400 ucf students, the average number of hours slept per night was 6.5 with a population standard deviation of 2 hours. a. create a 95% confidence interval for the true number of hours slept by ucf students?
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Ответ:
(6.304, 6.696)
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where = Population standard deviation.
n= sample size
= Sample mean
z* = Critical z-value .
Let x denotes the number of hours slept by UCF students.
Given :
n= 400
Two-tailed critical value for 95% confidence interval =
Then, the 95%confidence interval for the true number of hours slept by UCF students will be :-
Hence, the 95% confidence interval for the true number of hours slept by UCF students : (6.304, 6.696)
Ответ:
1/2 7/3
Step-by-step explanation: